Financing (Covenants and Redemption Provisions Applicable to Notes) (Narrative) (Details)	12 Months Ended
Dec. 31, 2020
Bonds \| Swiss franc-denominated senior unsecured bonds
Debt Instrument [Line Items]
Debt instrument, percentage of principal amount redeemed, threshold	85.00%
Senior notes
Debt Instrument [Line Items]
Percentage of notes' principal in addition to accrued interest that redemption price must equal or be greater than if a credit downgrade or change in control occurs	101.00%
Senior notes \| 2027 and 2032 Yen notes
Debt Instrument [Line Items]
Percentage of notes' principal in addition to accrued interest that redemption price must equal or be greater than if a credit downgrade or change in control occurs	100.00%
Debt instrument, redemption price, percentage	100.00%

Debt Instrument, Percentage of Redeemed Or Purchased And Canceled

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- Definition

Percentage Of Notes Principal That Redemption Price Must Equal Or Be Greater Than If A Credit Downgrade Or Change In Control Occurs

+ References

No definition available.

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- Definition

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+ References

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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